Polygon dissolve (by attribute)|Polygon Dissolve
shapes_polygons
QgsProcessingParameterFeatureSource|POLYGONS|Polygons|2|None|False
QgsProcessingParameterField|FIELD_1|1. Attribute|None|POLYGONS|-1|False|True
QgsProcessingParameterField|FIELD_2|2. Attribute|None|POLYGONS|-1|False|True
QgsProcessingParameterField|FIELD_3|3. Attribute|None|POLYGONS|-1|False|True
QgsProcessingParameterBoolean|BND_KEEP|Keep inner boundaries|True
QgsProcessingParameterVectorDestination|DISSOLVED|Dissolved